What is the 5654 vacuum tube?

The 5654 (5654 / CK5654) is a pentode vacuum tube designed for rf / preamp applications. Military miniature..

What is a 5654 substitute or equivalent?

Direct equivalents to the 5654 include EF95, 6AK5. These share the same pinout and operating envelope, so they can usually be swapped without circuit changes — though batch-to-batch variations between manufacturers (NOS vs current production) may shift the sonic character noticeably.

What are the key specifications of the 5654?

Transconductance gm ≈ 5 mA/V, plate resistance rp ≈ 340.0 kΩ, max plate voltage 200 V, max plate dissipation 1.65 W, heater 6.3 V / 0.175 A.

Is the 5654 still in production?

Production status varies by year and manufacturer. The current Amperatubes catalog classifies the 5654 as Common availability. NOS (new-old-stock) examples from RCA, Mullard, Tung-Sol, GE, Sylvania and Telefunken trade among collectors; modern production where it exists comes mostly from JJ Electronic, Electro-Harmonix, Tung-Sol (New Sensor), Genalex, and a handful of small-batch makers.

What does the 5654 sound like?

Military miniature.. Sonic character also depends heavily on the circuit operating point, the surrounding tubes in the stage, and the output transformer when present — use the interactive loadline calculator on this page to explore the trade-offs.

By Jean-Michel Falligan Devergne · Reviewed May 29, 2026

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5654 5654 / CK5654 Pentode Vacuum Tube

Pentode6.3V / 0.175A7-pin Miniature

SourceRaytheon·GEReviewed2026-05-29StatusDataModelCalcModelunder reviewPDF

Small-signal pentode for low-noise voltage amplification

Datasheet ↗

5654 / CK5654 — Raytheon·GE — pentode vacuum tube — (1953)

340.0kΩ

5.0mA/V

4.0pF

0.0pF

2.85pF

GAIN0%

POWER4%

DRIVE0%

LINEARITY75%

SPECIFICATIONS

Heater6.3 V · 0.175 A

Max Plate Voltage200 V

Pa max1.65 W

Gain Factor—

gm5 mA/V

rp340.0 kΩ

Inter-electrode capacitances

Cgk4 pF

Cgp0.02 pF

Cpk2.85 pF

Pinout7-pin Miniature

Era1953

RarityCommon

HEATER6.3V / 0.175A

MAX PLATE200V / 1.65W

BASEminiature-7

Source datasheets

12 manufacturer datasheets cross-checked for 5654 / CK5654

12 verified

Triode-connectedSiemens1.4.60 (1er avril 1960) — allemand

Specs when the screen grid (g2) is tied to the anode — the tube acts as a triode.

120 V

10 mA

6.7 mA/V

4.8

4.8 Ω

According to Siemens (Siemens & Halske Aktiengesellschaft, Wernerwerk für Bauelemente) — Siemens Röhren — RöK 3265 (1.4.60 (1er avril 1960) — allemand): « TRIODE CONNECTED »

EXECUTIVE SUMMARY

The 5654 is a indirectly-heated pentode from Raytheon·GE, introduced around 1953. Commonly used in rf / preamp applications. Military miniature.

APPLICATIONS

Voltage amplifier

Generic pentode rf / preamp stage

HISTORY

Introduced1953ManufacturerRaytheon·GE

Golden Age

5654 Datasheet

Local mirror · PDF

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METRIX TESTER

Test this tube on a Metrix

SPICE model not yet available. Loadline calculator requires calibrated Koren parameters.

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